Press for treating boards of alkaline cellulose and the like



Dec. 25'. 1928.- 1,696,474

W. DUTZMANN PRESS FOR TREATING BOARDS OF ALKALINE CELLULOSE AND THE LIKE Original Filed Nov. 13, 1925 if d :n a h2 2; e

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Patented Dec. 25, 1928.

UNITED STATES 1,696,474 PATENT OFFICE.

WILHELM D'U'TZMANN, OF NEUSTADT, GERMANY.

Application filed November 13, 1925, Serial No. 68,907, and in Germany February 23, 1925.

October My invention relates to a press for treating sheets or boards of alkali cellulose or the like, being soaked or steeped in alkali solutions or deteriorating acids, to make artificial silk therefrom; more especially my invention has relation to presses of the horizontal type i. e. to a pressing machine of a horizontal piston rod, arranged together with its pressing head within a horizontal chest or trough of suitable length, while the pressure cylinder and the other parts of the machine are mounted on, the outside of said trough. This arrangement has been made fort preventing the worker and his hands from coming in contact with'the alkali solutions r-acids, when handling the sheets or boards after their treatment within the trough.

My invention has for its object to materially lessen the duration of the indicated treatment and to simplify the method of o eration, without lessening the protection 0 the worker against the lI'IJHIlOUS action of the deteriorating agent. It is the further object of my invention to have the removal of the sheets or boards compressed from the steepin chest and their transport to the place 0 their further treatment carried out in such a manner, that the collaboration of the worker is restricted to the utmost degree. It is a further object of my invention to provide that the boards of cellulose and the metal-sheets separating the single cellulose boards from one another be prevented from having a sliding movement other than in a horizontal direction and.

from escaping upwardly, when the pressing piston is moving forward and the sheets are becoming compressed, as frequently has been experienced in using presses of such type.

My invention obviates all these disadvantages and my invention consists in the construction and combinations of parts hercinafter described, and set forth in the claims. In the accompanying drawings, Fig. 1 is a. longitudinal section of the material part of the press embodying my invention. Fig. 2 is a sectional plan view of the same. Fig. 3 is a cross section on line 3-3 of Fig. 2, seen in. the direction of the arrow 00 and Fig. 4 shows a collecting chest removed from the trough and ready for discharge.

Like parts are represented by similar letters or references in the several views.

a designates the steeping trough, as it is PRESS FOR TREATING BOARDS OF ALKALINE CELLULOSE AND THE LIKE.

Renewed 11, 1828.

called and b the horizontal pressing head, the piston rod of which is led by means of a stuffing box through the front wall a of the trough and which is designed to move to and fro horizontally above a perforated bottom 0 arranged within the steeping trough a. These parts have become known and do not form the object of my invention. The perforated bottom 0 does not reach to the end of the counter-bearing. It ends prematurely and is continued by the bottom 3 of the collecting chest (id opened in two directions viz above and to the head 6.

Along the sidewalls a of the steeping trough a, there are at the upper and lower end of them guiding ledges e having their continuation by corresponding guiding ledges f, fixed at the sidewalls d of the collecting chest. A corresponding flush continuation, too, exists at the perforated partitioning bottom a and the perforated bottom 3 of the collecting chest.

WVith the said guiding ledges e for instance, at their interruptions 6 the sheets are brought into engagement; then, the latter are uniformly divided over the whole length of the steeping trough a, and within the collecting chest itself.

The cellulose sheets, to be treated, now are put in the usual manner between the partitioning sheets, supported by the latter, the partitioning bottom 0 and the chest bottom 3. After the cellulose sheets have been steeped and the alkali solution discharged from the trough a, the head I) is moved forward and temporarily the whole contents of the trough i. e. the cellulose boards and the metal sheets are slowly forced into the collecting chest (Z; at the same time the boards are squeezed out and freed from the detrimental lye. Then, the collecting chest by means of a lifting machine or the like, from which the hook it is suspended, is removed from the steeping trough (L and put over a vessel 1'. The bottom 3 of the collecting chest (Z is hinged at 4 to the latter. If new the lock 5 is opened, the bottom 3 turns downward and the boards compressed, drop down into the vessel 2', whereas the partitioning sheets 9 are held in position by their guiding ledges f. The collecting chest immediately afterwards is adapted to be ut into the steeping trough 0:, in the meantime the head 6 still being in its drawn out position. Between the metal sheets connecting-chains k are arranged laterally; from the foremost metal sheet, chains are led to hooks b fixed to the head I) and after connecting the chains with the hooks b the metal sheets, when withdrawing the head, assume their normal correct position as indicated in Figs. 1 and 2, thus enabling the trough to be fed anew immediately thereupon.

The whole operation of the press is, as practical" tests have proved, adapted to be carried out, by one worker onl and without the necessity of bringing his fingers or garments in contact in any way with the steeped cellulose boards.

I wish it to be understood, that my invention is not restricted to the form as illustrated in the drawings, but what I claim is:

1. Horizontal press for treating articles in alkali solutions and acids having corrosive properties, more especially boards of alkali cellulose for the manufacture of artificial silk, comprising in combination with a horizontal press cylinder, piston rod and pressing head, a steeping trough receiving the pressing head and piston-rod, a perforated partitioning bottom within the trough, a collecting chest having its perforated bottom flush with the said partitioning bottom, metal sheets arranged within the trough and the said chest being open at the top and front end and adapted to receive all the metal sheets together with the boards when compressed, guiding ledges for the metal sheets and means for removing the collecting chest from the trough.

2. Horizontal press for treating articles in alkali solutions and acids havin corrosive properties, more especially boards of alkali cellulose for the manufacture of artificial silk, comprising in combination with a, horizontal press cylinder, piston rod and pressing head, a steeping trough receiving the pressing head and piston-rod, a perforated partitioning bottom within the trough, a collecting chest havin its perforated bottom flush with the sai partitioning bottom and adapted to receive all the metal sheets together with the boards compressed, the chest being open at the top and front end and having its bottom hinged, metal sheets, arranged within the trough and the said chest, and provided with cuts to enable the sheets to slide upon the said guiding ledges, means for joining the metal sheets together and with the pressing head and means for removing the collecting chest from the trough.

3. Horizontal press for treating articles in alkali solutions and acids having corrosive properties, more especially boards of alkali cellulose for the manufacture of artificial silk, comprising in combination with at herizontal press cylinder, piston rod and pressing head, a steeping trough receiving the pressing head and piston-rod, a perforated partitionin bottom within the trough, a collecting chest having its bottom flush with the said partitioning bottom, metal sheets arranged within the said trough and chest being open at the top and front end and adapted to receive all the metal sheets together with the boards when compressed, means for guiding the said metal sheets and. means for the removal of the chest from the trough.

4. Horizontal press for treating articles in alkali solutions and acids having corrosive properties, more especially boards of alkali cellulose for the manufacture of artificial sik comprising in combination with a horizontal press cylinder, piston rod and pressing head, a steeping trough, receiving the pressing head and piston-rod, a perforated partitioning bottom within the trough, a collecting chest having its bottom flush with the said \partitioning bottom, metal sheets arranged within the said trough and chest being open at the top and front end and adapted to receive all the metal sheets together with the boards when compressed, means for uidin the said metal sheets and means for 'lling into and discharging from the trough the corrosive agent and means for the removal of the chest from the trough.

5. Horizontal press for treating articles in alkali solutions and acids having corrosive properties, more especially boards of alkali cellulose for the manufacture of artificial silk, comprising in combination with a horizontal press cylinder, piston-rod and pressing head, a steeping trough, receiving the pressing head and piston rod, a collecting chest having its bottom flush with the bottom of the steeping trough, metal sheets arranged within the trough and the said chest being open at the top and front end and adapted to receive all the metal sheeets together with the'boards when compressed, and means for guiding the metal sheets within the trough and the chest, means for the removal of the chest from the trough and means for discharging the articles treated from the chest.

In testimony whereof, I have signed my name to this specification at l rankfort-onthe-Main, this 27th day of October, 1925.

WILHELM DUTZMANN. 

